- Leukemic cells from a chronic T-lymphocytic leukemia patient proliferated in response to both interleukin-2 and interleukin-4 without prior stimulation and produced interleukin-2 mRNA with stimulation. Umadome, H., Uchiyama, T., Onishi, R., Hori, T., Uchino, H., Nesumi, N. Blood (1988)